@wycats might have an ideahttps://twitter.com/jacobrothstein/status/895758095640535040 …
Instances. Entries are just an Iterator (which could also have flatMap) but you want sets to flatten into sets.
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Oh I see. I was definitely imagining the default return value of any collection function would be an Array. Hadn't considered Map -> Map
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It's kinda like jQuery().children(), which wants to produce a new jQuery, not Array.
End of conversation
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